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What important functions does an air receiver perform? Dissipates heat, Dampens compressor pulsations, Act as water oil trap On a compressed air system a safety valve would generally be installed on the? Air receiver Variable air volume system? Typic$12.49
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What important functions does an air receiver perform? Dissipates heat, Dampens compressor pulsations, Act as water oil trap On a compressed air system a safety valve would generally be installed on the? Air receiver Variable air volume system? Typic
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Course
Instrumentation & Controls/ boma
Institution
Instrumentation & Controls/ Boma
What important functions does an air receiver perform?
Dissipates heat,
Dampens compressor pulsations,
Act as water oil trap
On a compressed air system a safety valve would generally be installed on the?
Air receiver
Variable air volume system?
Typically use VFDs to save energy
In figu...
Instrumentation & Controls/ boma
Questions and Correct Verified Answers
What important function doesn't care receiver perform?
✓ Dissipate heat, dampens compressor pulsation, Act as water and oil trap
On a compressed air system a safety valve would generally be installed on the
✓ Air receiver
Variable air volume system
✓ Typically use the VFD's to save energy
In figure 1.3, a fool call for cooling would be at what branch pressure to the damper
motor
✓ 3PSIG
A ratio relay would be used to
✓ Controlled the sequence of actuators
when an actuated device is said to be normally open, that means the device is open
with
✓ No control pressure is applied
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, Top Mark Questions and Correct Verified Answers
In figure 1.4, the hot water valve has a 8 to 12 psig spring range, The damper motor has
a 3 to 8 psig spring range. The calibration point of the thermostat is
✓ 8 psig
When you are setting up an instrument, you should know all of the following except
✓ The rate of flow of the control agent
Which of the following is an example of a controlled with readjusted set point
✓ Sub master controller
In figure 1.5, the branch pressure from the temperature controller Increases in pressure
as the
✓ Control variable decreases in temperature
The departure of the control point from the set point, or the amount of that departure
is described as
✓ Deviation
The action of the control that increases its branch pressure As the control variable
increases
✓ Direct acting
In figure 1.3 maximum heating will be at what branch pressure to the damper motor?
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, Top Mark Questions and Correct Verified Answers
✓ 13 psig
In figure 1.0, if the hot water control valve was N/O instead of N/C, What would the
control action be
✓ Direct acting
A 3 way mixing valve
✓ Has two inlets and one comment outlet
What will be the typical range of a control sensor
✓ 4-20 mA
If you increase the percentage of proportional band on a receiver controller you would
in a effect
✓ Increase the psig/ fahrenheit output of the control
The temperature resistance characteristic of a thermistor is
✓ Non-linear
A reasonable consumption of control air for a thermostat would be
✓ 30-40 scim
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